The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 2025
Filed:
Dec. 20, 2021
Kabushiki Kaisha Yaskawa Denki, Fukuoka, JP;
Akinori Goto, Fukuoka, JP;
KABUSHIKI KAISHA YASKAWA DENKI, Fukuoka, JP;
Abstract
A decompression system includes: an electric pump configured to decompress a primary-side space with respect to a secondary-side space; and a control device configured to control a motor of the electric pump, wherein the control device includes: a torque command generation unit configured to generate a torque command to operate the motor in accordance with an operation command; a limiter configured to limit the torque command to a limit value or less; a power conversion circuit configured to generate driving power corresponding to the torque command passed through the limiter and supply the driving power to the motor; and a limit changing unit configured to temporarily increase the limit value in response to opening of the decompressed primary-side space with respect to the secondary-side space.